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68 lines
2.5 KiB
Diff
68 lines
2.5 KiB
Diff
From ada84d07af6097b2addd18262668ce6cb9e15206 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Fri, 18 Nov 2022 06:39:27 +0000
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Subject: [PATCH] nvmem: u-boot-env: add Broadcom format support
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Broadcom uses U-Boot for a lot of their bcmbca familiy chipsets. They
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decided to store U-Boot environment data inside U-Boot partition and to
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use a custom header (with "uEnv" magic and env data length).
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Add support for Broadcom's specific binding and their custom format.
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Ref: 6b0584c19d87 ("dt-bindings: nvmem: u-boot,env: add Broadcom's variant binding")
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
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Link: https://lore.kernel.org/r/20221118063932.6418-9-srinivas.kandagatla@linaro.org
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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drivers/nvmem/u-boot-env.c | 14 ++++++++++++++
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1 file changed, 14 insertions(+)
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--- a/drivers/nvmem/u-boot-env.c
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+++ b/drivers/nvmem/u-boot-env.c
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@@ -16,6 +16,7 @@
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enum u_boot_env_format {
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U_BOOT_FORMAT_SINGLE,
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U_BOOT_FORMAT_REDUNDANT,
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+ U_BOOT_FORMAT_BROADCOM,
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};
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struct u_boot_env {
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@@ -40,6 +41,13 @@ struct u_boot_env_image_redundant {
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uint8_t data[];
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} __packed;
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+struct u_boot_env_image_broadcom {
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+ __le32 magic;
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+ __le32 len;
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+ __le32 crc32;
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+ uint8_t data[0];
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+} __packed;
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+
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static int u_boot_env_read(void *context, unsigned int offset, void *val,
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size_t bytes)
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{
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@@ -138,6 +146,11 @@ static int u_boot_env_parse(struct u_boo
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crc32_data_offset = offsetof(struct u_boot_env_image_redundant, data);
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data_offset = offsetof(struct u_boot_env_image_redundant, data);
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break;
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+ case U_BOOT_FORMAT_BROADCOM:
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+ crc32_offset = offsetof(struct u_boot_env_image_broadcom, crc32);
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+ crc32_data_offset = offsetof(struct u_boot_env_image_broadcom, data);
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+ data_offset = offsetof(struct u_boot_env_image_broadcom, data);
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+ break;
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}
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crc32 = le32_to_cpu(*(__le32 *)(buf + crc32_offset));
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crc32_data_len = priv->mtd->size - crc32_data_offset;
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@@ -202,6 +215,7 @@ static const struct of_device_id u_boot_
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{ .compatible = "u-boot,env", .data = (void *)U_BOOT_FORMAT_SINGLE, },
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{ .compatible = "u-boot,env-redundant-bool", .data = (void *)U_BOOT_FORMAT_REDUNDANT, },
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{ .compatible = "u-boot,env-redundant-count", .data = (void *)U_BOOT_FORMAT_REDUNDANT, },
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+ { .compatible = "brcm,env", .data = (void *)U_BOOT_FORMAT_BROADCOM, },
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{},
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};
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